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Enum.TryParse(stringRepresentationOfEnum, true, out enumValue);
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service.DoOperation(DateTime.Now, true, false, false, true, currentValue, userName);

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bool includeHeader = true;
bool checkSecurity = false;
bool validateDate = false;
bool fireCompletionEvent = true;
service.DoOperation(DateTime.Now, includeHeader, checkSecurity, validateDate, fireCompletionEvent, currentValue, userName);

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service.DoOperation(DateTime.Now, includeHeader: true, checkSecurity: false, validateDate: false, fireCompletionEvent: false, currentValue, userName);


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service.DoOperation(DateTime.Now, includeHeader: true, checkSecurity: false, validateDate: false, fireCompletionEvent: false, currentValue: currentValue, userName: userName);

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service.DoOperation(DateTime.Now, currentValue, userName, includeHeader: true, checkSecurity: false, validateDate: false, fireCompletionEvent: false);
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